Claude Sonnet 5
Parameters
Undisclosed
Context Length
1M
Modality
Multimodal
Architecture
Undisclosed
License
Proprietary
Release Date
30 Jun 2026
Knowledge Cutoff
Jan 2026
API Pricing (per 1M)
Input: $2.00 · Output: $10.00
Evaluation Benchmarks
Rank
#33
| Benchmark | Score | Rank |
|---|---|---|
StackUnseen | 0.947 | 🥈 2 |
Agentic Coding | max 0.59 | 13 |
Agent Arena | high 0.04 | 16 |
Coding | max 0.81 | 20 |
Reasoning | max 0.89 | 20 |
Mathematics | max 0.93 | 22 |
General | max 0.76 | 29 |
LiveBench Average | max 0.76 | 30 |
Agentic Index | max 0.44 | 30 |
Coding Index | max 0.71 high 0.66 | 37 55 |
Web Development | high 1540 | 42 |
Data Analysis | max 0.72 | 46 |
General Text | high 1461 | 51 |
Intelligence Index | max 0.34 high 0.23 medium 0.28 low 0.24 | 60 139 100 128 |
Rankings
Overall Rank
#33
Coding Rank
#18
About Claude Sonnet 5
Anthropic's Claude Sonnet 5 is built for agentic workflows, long-horizon coding, and high-efficiency reasoning with a 1M token context window and adaptive thinking by default.
Technical Specifications
Architecture specifications are undisclosed for proprietary models.
Resources
About Claude Sonnet 5
Anthropic's Claude Sonnet 5, released June 30, 2026, is built to be the most agentic Sonnet-class model, offering near-Opus 4.8 level intelligence, coding, and tool use at Sonnet pricing. It features a 1M token context window by default, 128k maximum output tokens, and adaptive thinking enabled by default.